Rig Contract Cancellation

12 February 2016

Rockhopper Exploration plc

("Rockhopper" or the "Company")

Rig Contract Cancellation

Rockhopper Exploration plc (AIM: RKH), the oil and gas exploration and production company with interests in the North Falkland Basin and Greater Mediterranean region, announces that Premier Oil (on behalf of the Joint Venture) has served a notice to terminate the rig contract with Ocean Rig UDW ("Ocean Rig") with immediate effect. The notice to terminate follows a number of operational issues with the Eirik Raude rig. As a result, the drilling of the Chatham well - the final well in current campaign - will now be deferred until the Sea Lion pre-development drilling campaign.

The postponement of the Chatham well has no impact on the planning or timetable for the Field Development Plan for the Sea Lion initial phase development.

Rockhopper had an unaudited cash balance of approximately $110 million at the end of December 2015. Taking into account the expected residual costs of the current exploration campaign and the Company's continued investment in Sea Lion FEED activities, preliminary estimates of the Company's cash balance at 31 December 2016 are now in the range of $70 - 80 million. The year-end 2016 preliminary cash estimate is subject to the outcome of a number of material items including exploration drilling cost audits, disputes and insurance claims - the outcomes of which should be known around mid 2016.

Samuel Moody, CEO, commented:

"Whilst it is a shame not to be able to drill Chatham as part of this campaign the resources added at the Zebedee location, along with the potentially very significant discoveries in the Isobel/Elaine area, mean that from a sub surface perspective this has been a hugely successful campaign."

Enquiries

Rockhopper Exploration plc

Tel: (via Vigo Communications) - 020 7016 9573

Sam Moody - Chief Executive

Fiona MacAulay - Chief Operating Officer

Stewart MacDonald - Chief Financial Officer

Canaccord Genuity Limited (NOMAD and Joint Broker)

Tel: 020 7523 8000

Henry Fitzgerald-O'Connor

Liberum Capital (Joint Broker)

Tel: 020 3100 2227

Clayton Bush

Vigo Communications

Tel: 020 7016 9573

Patrick d'Ancona

Ben Simons